EP 3589988 A4 20201209 - OPTICAL ARTICLES COMPRISING PHOTOCHROMIC POLY(UREA-URETHANE)
Title (en)
OPTICAL ARTICLES COMPRISING PHOTOCHROMIC POLY(UREA-URETHANE)
Title (de)
OPTISCHE ARTIKEL MIT PHOTOCHROMEM POLY(HARNSTOFF-URETHAN)
Title (fr)
ARTICLES OPTIQUES COMPRENANT DU POLY (URÉE-URÉTHANE) PHOTOCHROMIQUE
Publication
Application
Priority
- US 201762465639 P 20170301
- US 2018020524 W 20180301
Abstract (en)
[origin: US2018251675A1] A process for producing a photochromic eyewear lens. In one embodiment at least a layer of modified photochromic poly(urea-urethane) is formed by combining photochromic material and the reaction product of a polyurethane pre-polymer and a mixture of diethyltoluene diamine and one or more polyols, plus catalyst. The mixture comprises both NH2 and OH reactive groups, with at least 0.04 equivalent weights of OH reactive species available for reaction with each 1.0 equivalent weight of excess NCO reactive species available in the pre-polymer. The lens comprising the modified photochromic poly(urea-urethane) can exhibit faster fade-back rates and better photochromic performance than lenses with non-modified poly(urea-urethane).
IPC 8 full level
B24D 11/00 (2006.01); B29D 11/00 (2006.01); B32B 27/40 (2006.01); C08G 18/10 (2006.01); C08G 18/44 (2006.01); C08G 18/66 (2006.01); C08K 5/1545 (2006.01); C09D 175/04 (2006.01); C09K 9/02 (2006.01); G02B 1/04 (2006.01); G02C 7/10 (2006.01)
CPC (source: EP US)
B29D 11/00009 (2013.01 - US); B29D 11/00653 (2013.01 - EP US); B29D 11/00865 (2013.01 - EP US); C08G 18/10 (2013.01 - EP US); C08G 18/324 (2013.01 - US); C08G 18/44 (2013.01 - EP US); C08G 18/6651 (2013.01 - EP US); C08G 18/6685 (2013.01 - EP US); C08G 18/75 (2013.01 - US); C08K 5/1545 (2013.01 - US); C09D 175/04 (2013.01 - EP US); C09K 9/02 (2013.01 - EP US); G02C 7/102 (2013.01 - EP US); B29D 11/00442 (2013.01 - EP US); B29K 2075/02 (2013.01 - US); B29K 2995/0018 (2013.01 - US); C08K 5/1545 (2013.01 - EP); C09K 2211/1018 (2013.01 - US); G02C 2202/16 (2013.01 - EP US)
Citation (search report)
- [XI] US 2004096666 A1 20040520 - KNOX CAROL L [US], et al
- [I] US 2001050356 A1 20011213 - CRANO JOHN C [US], et al
- [A] US 2008071016 A1 20080320 - BOETTCHER DAVID J [US], et al
- [A] JP 2001026630 A 20010130 - MITSUI CHEMICALS INC
- See references of WO 2018160885A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
US 10934480 B2 20210302; US 2018251675 A1 20180906; AU 2018227845 A1 20190815; AU 2018227845 B2 20221103; AU 2018227845 B9 20221117; CA 3051702 A1 20180907; CA 3051702 C 20220201; CN 110537114 A 20191203; CN 110537114 B 20230721; EP 3589988 A1 20200108; EP 3589988 A4 20201209; JP 2020509422 A 20200326; JP 7033605 B2 20220310; US 2021179931 A1 20210617; WO 2018160885 A1 20180907
DOCDB simple family (application)
US 201815909841 A 20180301; AU 2018227845 A 20180301; CA 3051702 A 20180301; CN 201880014374 A 20180301; EP 18760986 A 20180301; JP 2019547432 A 20180301; US 2018020524 W 20180301; US 202117185822 A 20210225